EP 0176708 B1 19891102 - TEMPERATURE PROTECTION CIRCUIT WITH HYSTERESIS
Title (en)
TEMPERATURE PROTECTION CIRCUIT WITH HYSTERESIS
Publication
Application
Priority
DE 3429555 A 19840810
Abstract (en)
[origin: US4887181A] A temperature protection circuit includes a band gap circuit furnishing a first reference voltage being temperature independent. An amplifier circuit connected to the band gap circuit for receiving and amplifying the first reference voltage and supplying a second reference voltage. A negative feedback network is connected to the amplifier circuit for feeding back the second reference voltage to the amplifier circuit, a sensor circuit is connected between the amplifier circuit and the negative feedback network, temperature-determining circuit parts are thermally coupled to the sensor circuit and supply a temperature dependent voltage to the sensor circuit. The sensor circuit compares the second reference voltage with the temperature dependent voltage according to a given comparison criterion, and a control circuit is activated by the sensor circuit if the comparison criterion is fulfilled for controlling the temperature-determining circuit parts. The control circuit includes a feedback of the sensor circuit to the negative feedback network.
IPC 1-7
IPC 8 full level
H02H 5/04 (2006.01); H02H 7/20 (2006.01); H03F 1/42 (2006.01); H03F 1/52 (2006.01); H03K 17/08 (2006.01); H03K 17/082 (2006.01)
CPC (source: EP US)
H02H 5/044 (2013.01 - EP US); H03F 1/52 (2013.01 - EP US); H03K 17/0826 (2013.01 - EP US); H03K 2017/0806 (2013.01 - EP US); Y10S 323/907 (2013.01 - EP US)
Citation (examination)
- EP 0106378 A1 19840425 - BELL TELEPHONE MFG [BE], et al
- TIETZE/Schenk: Halbleiter-Schaltungstechnik,6.Auflage 1983, Seiten 534-537
Designated contracting state (EPC)
AT DE FR GB IT NL
DOCDB simple family (publication)
EP 0176708 A1 19860409; EP 0176708 B1 19891102; AT E47773 T1 19891115; DE 3574087 D1 19891207; JP H0154929 B2 19891121; JP S6149616 A 19860311; US 4887181 A 19891212
DOCDB simple family (application)
EP 85109989 A 19850808; AT 85109989 T 19850808; DE 3574087 T 19850808; JP 17395485 A 19850807; US 8914587 A 19870825